Air heater for furnaces



Nov. 2,74*, 1923.

N. D. GOFF AIRIHEATER FOR FURNACES Filed March 9 INVENTOR. BY dATTORNEYS.

Patented Nov. 27, i923.

.NEWEL D. GOFF, @E PROVIDENCE. RHODE ISLAND. i,

seres.

I 'l AIR HEATER son. FUBNACES- Application filed March 9,' 1923. SerialNo. 623,983. i

ToaZZ' ywhom imag concern: Y

Be it known that I, Nnwnn D. Gern, a

citizen of the United States, residing at Providence, in the county ofProvidence and 5 State of TBhode Island, have inventedk certain new anduseful Improvements in Air Heaters for Furnaces, of which thefollowinglis a specification.

` VThis invention relates to improvements in fuel saving attachments forstoves, boil- `ers and furnaces of the type where an air inlet isarranged to deliverheated air in the top part'of the firepot.

It belongs to the'class of such''devices peculiarly adapted .forfurnaces of all kinds in which it is desired to burn a poor grade ofhard coal, soft coal, buckwheat, or other similar fuel which, underordinary conditions, burns with difiiculty, if at all.

By the use of my device, the amount of clinkers and ashesv isgreatlyreduced and -the eiiiciency of the lire much increased.

My device, preferably, is attached to the fire door and is so arrangedthat the amount of air entering therethrough vcan be regu lated inaccordance with the fuel and other conditions and will rapidly be heatedby contact with the outside of my device which is of peculiar form. rIheair inlet is so pojust above the level of the coal at the front, as Iclaim by this arrangement much better results are produced than whenheated air is delivered at the top of the lire box or fire dome.

In the drawings, Figure 1 is a sectional side elevation on line 1--1 ofFig. 2 of a common form of furnace with my device in position.

Fig. 2 is a front elevation showing the front door of a furnace equippedwith my device showing the damper open.

Fig. 3 is a vertical section on line 3 3 of Fig. 1. i

Fig. i is a diagrammatic sectional elevation showing the relative sizeof parts in an ordinary round boiler. l v In the drawings, T representsthe fire box of a furnace of anv ordinary type having walls such as 11and what I might call the lire pot, the walls of which extend upward asfar as 12, forming a water jacket 5. f

10 represents the opening for fire door H which may be hinged in theusual manner at 9. Through' this door I out an opening sitioned that theheated air will be delivered 15 which,as shown, is preferably ofcircular form. 1 f

B represents a coverV of cap shape having ap'rotrudingcenter and asquared flange 8 through which are suitable bolt holes 7,37, 7,] bywhich it is fastened in position ou"" side door H so` as to coveropening 15.

A represents an adjustable damper pivoted at 6 tocover `B` andk havingtriangular shaped holes 22 which register withvsimilar holes 2O in`cover B. Mv is 'a handle for the damper. l

Preferably, a scale 21 is marked on cover 'TB' and with this rvengagespointer 4 on?Y the damper lA whereby the extent of adjustment,

may be rea-d and, if necessary, regulated.

Inside the cap part of cover B, I locate an air distributing plate Chaving air holes Qanear its peripherywhereby the air entering throughthe openings 22 and 2O is directed towards the outside of the inside ofthe goose neck or conduit to be described.

The fins 66 and 67 position the plate C and hold it in place.

F represents a goose neck which has a circular opening around which is asquare flange 30 which has four holes 3l, 31, 31, 31 through which passthe bolts 16 and 16 which also pass through the holes 68, 68, 68, 68 indoor I-I and 7, 7, 7, 7 in cover B. By means of these` boltsv and holesthe parte can easily be assembled or taken apart.

At the point 32 this goose neck is con` stricted and swells out at 37,at which point I arrange a'baiiie plate D supported byr means of fourears 34e` whereby the Vcourse of the current of air is kept around theoutside where it should be most rapidly heated.

At 35 the goose neckezztends in to its farthest point in the lire boxand thence eX# tends back and down at 36 and has a nozzle 37 which is sopositioned that it will be level with the bottom of the door.

VMy `whole device swings out when'thedoor is opened in order to feedcoal, and it is desirable that the coal should be piled up from cover;an air distributing plate having air holesnear itsperiphery fixediinsidesaid cover; a goose neck fixed to theinside of said door over saidopening and extending thence inward, thenoebackY and down to a nozzle ona level with and proximate the bottom of said door; and a substantiallycircular bathe plate iixed inedially in said goose neck to cause the airto circulate closely inside the Walls of the goose neck. Y 2. Thecombination with the lire door of a furnacehaving an opening; of a coverfixed outside4 said door so as to cover such opening; an adjustabledamper in said cover; a goose neck fixed to the inside of said door oversaid openingl and extending thence inward, thence backranddown to anozzle on a level with and proximatel the bottom of said door; and aysubstantially circular- 'baiiie plate iixed niedially'in-said goose neckto cause the air to circulate closely inside the wallsof the gooseneck.V

The combination with the fire door of a furnace having a circularopening; yof a` cover fixed outside said door so as to cover rlhecombination with the fire door of aA furnace havingan opening; of agoose neck fixed to the inside of said door over said o enino`andextendinfr thence inward thence` 3 b 7 back and down to a nozzle on alevel with and proximate the bottom of said door.

5. The combination in a furnace having a fire door opening; of a firedoor so pivoted as to open and close such opening, and itself having anopening; and a goose neck fixed to the inside or" said door over saiddoor opening and extending thence inward, thence back Vand down to anozzle on a level with and proximate the bottom of said door and soJformed and positioned that it `can swing in and out of 'said lire dooropening With the fire door.

NEVVEL D. GOFF. y

